StoreFrontAdmin.CascadeDataSource = SC.CascadeDataSource.extend( {
    geoDataSource: StoreFrontAdmin.GeoDataSource.create(),
    langDataSource: StoreFrontAdmin.LangDataSource.create(),
    dataSources: ['geoDataSource', 'langDataSource']
});

//in core.js


	store = SC.Store.create({
	  //commitRecordsAutomatically: YES
	}).from('StoreFrontAdmin.CascadeDataSource');